| Roles | Competed in Olympic Games | |
|---|---|---|
| Sex | Male | |
| Full name | Dirk•Janssen | |
| Used name | Dirk•Janssen | |
| Born | 11 July 1881 in Groningen, Groningen |  NED |
| Died | 22 November 1986 (aged 105 years 4 months 11 days) in Haarlem, Noord-Holland | NED |
| Affiliations | Plato — Amsterdam, Noord-Holland | NED |
| NOC | Netherlands | NED |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1908 Summer Olympics | Artistic Gymnastics (Gymnastics) | NED |
Dirk Janssen | |||
| All-Around, Individual, Men (Olympic) | 69 | |||||
| Team, Men (Olympic) | Netherlands | 7 |
